Spacelog Apollo 8

Apollo 8, Houston.

Apollo 8, Houston.

Apollo 8, Houston.

Apollo 8, Houston. Copy that you are now in PTC attitude, and we're watching your gimbal angle. We apparently do not have a downlink voice, but the data is good.

Houston, Apollo 8. Over.

Loud and clear, 8.

Okay. We're establishing PTC. We took one last look at the moon and on our way back.

Apollo 8, Houston.

Go ahead, Houston.

Okay. In order for us to handle the antenna switching, I guess we'd like to have the AUX tape switched to OFF, and the tape FORWARD switch OFF; and we'll be switching between OMNI's Bravo and Delta.

Between what and what?

Okay. We are going to be switching between OMNI's Bravo and Delta.

Okay.

Charlie 62.

Okay.

And Delta 57.33842.

That's a coincidence. That's just what I worked out on Lovell's slide rule.

How are we doing on the cryos?

Oh, you've got some pretty good numbers on that that I sent up yesterday, and you had about 160 hours. Well, I'll check that out, but you were fat on cryo. I've got some SPS DELTA-V. You've got 33:20. You fly the service module RCS through the DAP. You have 142; and through SCS, it's 121.

Roger.

Apollo 8, Houston. We can't monitor on low bit rate whether you started your fuel cell purge. If you haven't, we can still go ahead and start now; and if you can, keep us posted as you go through it.

Roger. You want an O₂ and an H₂ purge, Ken?

That's affirmative.

You shall have it.

Apollo 8, Houston —

Go ahead.

It looks like you may be in OMNI Alfa. Can you confirm that we're set up to switch between Bravo and Delta?

You are now.

Okay. Thank you very much. And you are in the fuel cell purge?

It's complete.

Okay. Understand the purge is complete. Thank you. And in reference to your cryo, it looks like we'll have 180 pounds in each oxygen tank at SEP and 11 pounds in each hydrogen tank. And you're well above the single tank capability.